Application Layer

The application layer provides  an  interface between  application  entities and the  users computer. This layer offers services to a variety of aspects of data communication between  the user computer and application entities including terminal handling file handling text interchange job transfer and manipulation. The  application  layer offers variety of application such  as e mail data transfers file transfer digitized video audio data remote  login  and other internet services.

• Network virtual terminal. A network virtual terminal is a software version of a physical terminal and it allows a user to log on to a remote host.
• File transfer access and management. Application allows a user to access fuel in a remote host to retrieve files from a remote compute for uses in the local computer and to mange or control files in a remote computer locally.
• Mail services. This application provides the basis for e mail forwarding and storage.
• Directory services. Application provides distributed database sources and access for global information about various objects and services.